Traffic control device detection
First Claim
Patent Images
1. A vehicle system comprising:
- a speed sensor configured to measure a speed of a host vehicle and output a signal representing the speed of the host vehicle; and
an on-board processing device programmed to receive a signal representing the speed of the host vehicle output by the speed sensor, determine an amount of time the speed of a host vehicle is below a speed threshold, and detect a presence of a traffic control device based on the amount of time the speed is below the speed threshold,wherein the on-board processing device is further programmed to determine a type of traffic control device based on a recent maximum speed of the host vehicle and the amount of time the speed of the host vehicle is below the speed threshold, wherein the recent maximum speed of the host vehicle is greater than zero.
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Abstract
An example vehicle system includes a speed sensor that measures a speed of a host vehicle and a processing device programmed to compare the speed to a speed threshold and determine an amount of time the speed is below the speed threshold. The processing device detects the presence of a traffic control device based on the amount of time the speed is below the speed threshold.
25 Citations
17 Claims
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1. A vehicle system comprising:
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a speed sensor configured to measure a speed of a host vehicle and output a signal representing the speed of the host vehicle; and an on-board processing device programmed to receive a signal representing the speed of the host vehicle output by the speed sensor, determine an amount of time the speed of a host vehicle is below a speed threshold, and detect a presence of a traffic control device based on the amount of time the speed is below the speed threshold, wherein the on-board processing device is further programmed to determine a type of traffic control device based on a recent maximum speed of the host vehicle and the amount of time the speed of the host vehicle is below the speed threshold, wherein the recent maximum speed of the host vehicle is greater than zero. - View Dependent Claims (2, 3, 4, 5, 6, 14, 15, 16, 17)
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7. A method comprising:
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measuring, via a speed sensor, a speed of a host vehicle; comparing, via the on-board processing device, the speed to a speed threshold; determining an amount of time the speed is below the speed threshold; detecting, at the host vehicle, a presence of a traffic control device based on the amount of time the speed is below the speed threshold; and determining a type of traffic control device based on both of a recent maximum speed of the host vehicle and the amount of time the speed of the host vehicle is below the speed threshold, wherein the recent maximum speed of the host vehicle is greater than zero. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A vehicle system comprising:
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a speed sensor configured to measure a speed of a host vehicle; an on-board processing device programmed to compare the speed to a speed threshold and determine an amount of time the speed is below the speed threshold; and a navigation system programmed to determine a location of the host vehicle; wherein the on-board processing device is programmed to detect a presence of a traffic control device based on the amount of time the speed is below the speed threshold, and determine a location of the traffic control device based on the location of the host vehicle, wherein the on-board processing device is further programmed to determine a type of traffic control device based on a recent maximum speed of the host vehicle and the amount of time the speed of the host vehicle is below the speed threshold and store the presence and type of traffic control device in a location database, wherein the recent maximum speed of the host vehicle is greater than zero.
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Specification